Benefits of a Rubric:

1. Clarify constraints with students, collegues, other evaluators, administrators, and yourself.
2. Communicate expectations with students:
   A rubric tells students what is expected of them, the grading criteria, what counts and what doesn't, how many points they would earn for each task, and how their work is graded.  
3. Bring some level of objectivity to subjective scoring.
4. Easy scoring and recording of it.
5. Communicate grades with students:
   A graded rubric helps students understand how they were graded and what their areas of strength and weakness are.